Disruption of the Standard Kinetochore in Holocentric Species

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2023 May 16

PMID 37192159

Authors

Pavel Neumann

Ludmila Oliveira

Tae-Soo Jang

Petr Novak

Andrea Koblizkova

Veit Schubert

Andreas Houben

Jiri Macas

Affiliations

Soon will be listed here.

Abstract

The segregation of chromosomes depends on the centromere. Most species are monocentric, with the centromere restricted to a single region per chromosome. In some organisms, the monocentric organization changed to holocentric, in which the centromere activity is distributed over the entire chromosome length. However, the causes and consequences of this transition are poorly understood. Here, we show that the transition in the genus was associated with dramatic changes in the kinetochore, a protein complex that mediates the attachment of chromosomes to microtubules. We found that in holocentric species, the genes were lost; the , and genes were truncated; the centromeric localization of CENH3, CENP-C, KNL1, MIS12, and NDC80 proteins was disrupted; and the spindle assembly checkpoint (SAC) degenerated. Our results demonstrate that holocentric species lost the ability to form a standard kinetochore and do not employ SAC to control the attachment of microtubules to chromosomes.

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